Traffic calming on the St Helier estate and failed coil springs
The St Helier estate was laid out in the 1920s and 30s with long, straight residential avenues, and traffic calming now keeps speeds down on many of them. Every speed cushion puts a jolt through the coil springs and shock absorbers, and over the years springs corrode and snap, usually near the bottom coil. A broken spring is one of the more frequent MOT fails on family cars, and many owners don't notice it until the tester points it out, because the car often drives almost normally.
Morden's main roads add stop-start wear. The A24 London Road through the town centre is dominated by buses and crossings, and the Morden Hall roundabout, where St Helier Avenue meets Morden Hall Road and Morden Road, is a busy multi-exit junction. Brakes and front tyres do plenty of work, and the tester measures braking efficiency and balance on the roller tester. If one side is weaker, it's often a seized calliper slider, which is a straightforward repair.
Around Merton Park and the streets near Imperial Fields, a lot of cars stay with the same family for many years and do modest mileage. That's kind to the engine but brings its own MOT risks: tyres with plenty of tread that are cracking with age, perished wiper blades and bulbs that have quietly failed. We record anything close to the limit as an advisory so you can plan for it, and quote any failure repairs in writing before touching them.
It's about 4 miles to us: Morden Hall Road to the roundabout, then Morden Road through Mitcham and Carshalton Road south to Hackbridge. The test takes 45 to 60 minutes. If repairs are needed and the car stays with us, the partial retest within 10 working days is free, and repair work carries our 3-month workmanship warranty.

